Miller LE350804 Owner's manual

Millermatic 350 And

Millermatic 350P

with Roughneck 4012 Gun

Processes

Description

Arc Welding Power Source

and Wire Feeder

OM-1327 213 814E

August 2004

Visit our website at

www.MillerWelds.com

MIG (GMAW) Welding

Pulsed MIG (GMAW-P)

Flux Cored (FCAW) Welding

Miller Electric manufactures a full line

of welders and welding related equipment.

For information on other quality Miller

products, contact your local Miller distributor to receive the latest full

line catalog or individual catalog sheets. To locate your nearest

distributor or service agency call 1-800-4-A-Miller, or visit us at

www.MillerWelds.com on the web.

Thank you and congratulations on choosing Miller. Now you can get

the job done and get it done right. We know you don’t have time to do

it any other way.

That’s why when Niels Miller first started building arc welders in 1929,

he made sure his products offered long-lasting value and superior

quality. Like you, his customers couldn’t afford anything less. Miller

products had to be more than the best they could be. They had to be the

best you could buy.

Today, the people that build and sell Miller products continue the

tradition. They’re just as committed to providing equipment and service

that meets the high standards of quality and value established in 1929.

This Owner’s Manual is designed to help you get the most out of your

Miller products. Please take time to read the Safety precautions. They

will help you protect yourself against potential hazards on the worksite.

We’ve made installation and operation quick

and easy. With Miller you can count on years

of reliable service with proper maintenance.

And if for some reason the unit needs repair,

there’s a Troubleshooting section that will

help you figure out what the problem is. The

parts list will then help you to decide the

exact part you may need to fix the problem.

Warranty and service information for your

particular model are also provided.

Miller is the first welding

equipment manufacturer in

the U.S.A. to be registered to

the ISO 9001:2000 Quality

System Standard.

Working as hard as you do

− every power source from

Miller is backed by the most

hassle-free warranty in the

business.

From Miller to You

Mil_Thank 7/03

TABLE OF CONTENTS

SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1. Symbol Usage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2. Arc Welding Hazards 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3. Additional Symbols For Installation, Operation, And Maintenance 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4. California Proposition 65 Warnings 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-5. Principal Safety Standards 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-6. EMF Information 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2 − CONSIGNES DE SÉCURITÉ − À LIRE AVANT UTILISATION 5 . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1. Signification des symboles 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2. Dangers relatifs au soudage à l’arc 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3. Autres symboles relatifs à l’installation, au fonctionnement et à l’entretien de l’appareil. 7 . . . . . . . . . . .

2-4. Principales normes de sécurité 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-5. Information sur les champs électromagnétiques 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 3 − INSTALLATION 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1. Specifications 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2. Duty Cycle And Overheating 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-3. Volt-Ampere Curve 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-4. Installing Work Clamp 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-5. Installing Welding Gun/Cable Holder 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-6. Installing Welding Gun 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-7. Connecting Spoolmatic) 15A Or 30A Gun 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-8. Connecting XR Edge, XR-A Gun, Or XR-A Python 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-9. Setting Gun Polarity For Wire Type 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-10. Installing Gas Supply 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-11. Installing Wire Spool and Adjusting Hub Tension 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-12. Electrical Service Guide 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-13. Selecting A Location And Connecting 3-Phase Input Power 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-14. Selection A Location And Connecting 1-Phase Input Power 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-15. Threading Welding Wire For Roughneck Gun 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-16. Threading Welding Wire For XR Edge, XR-A Gun, Or XR-A Python 20 . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-17. Threading Welding Wire Through XR Guns 21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 4 − OPERATION 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-1. Controls 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-2. MIG Mode 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-3. Jog Mode 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-4. Weld Status 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-5. MIG Gun-On-Demand 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-6. Pulse MIG Mode Voltage Adjustment 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-7. Pulse MIG Gun-On-Demand 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-8. Tip Saver 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-9. Weld Parameters For MIG And Pulse Mode 24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 5 − PROGRAMMING 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-1. MIG Welding Mode 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-2. Pulse MIG Welding Mode 26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-3. Timers 27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-4. Arc Times And Arc Starts 28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-5. System Reset 29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TABLE OF CONTENTS

SECTION 6 − MAINTENANCE &TROUBLESHOOTING 30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-1. Routine Maintenance 30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-2. Overheating 30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-3. Changing Drive Roll and Wire Inlet Guide 31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-4. Troubleshooting 32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-5. Help Displays 34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 7 − ELECTRICAL DIAGRAM 36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 8 − PARTS LIST 38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

WARRANTY

OM-1327 Page 1

SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING

som _8/03

1-1. Symbol Usage

Means Warning! Watch Out! There are possible hazards

with this procedure! The possible hazards are shown in

the adjoining symbols.

Y Marks a special safety message.

. Means “Note”; not safety related.

This group of symbols means Warning! Watch Out! possible

ELECTRIC SHOCK, MOVING PARTS, and HOT PARTS hazards.

Consult symbols and related instructions below for necessary actions

to avoid the hazards.

1-2. Arc Welding Hazards

Y The symbols shown below are used throughout this manual to

call attention to and identify possible hazards. When you see

the symbol, watch out, and follow the related instructions to

avoid the hazard. The safety information given below is only

a summary of the more complete safety information found in

the Safety Standards listed in Section 1-5. Read and follow all

Safety Standards.

Y Only qualified persons should install, operate, maintain, and

repair this unit.

Y During operation, keep everybody, especially children, away.

ELECTRIC SHOCK can kill.

Touching live electrical parts can cause fatal shocks

or severe burns. The electrode and work circuit is

electrically live whenever the output is on. The input

power circuit and machine internal circuits are also

live when power is on. In semiautomatic or automatic wire welding, the

wire, wire reel, drive roll housing, and all metal parts touching the

welding wire are electrically live. Incorrectly installed or improperly

grounded equipment is a hazard.

D Do not touch live electrical parts.

D Wear dry, hole-free insulating gloves and body protection.

D Insulate yourself from work and ground using dry insulating mats

or covers big enough to prevent any physical contact with the work

or ground.

D Do not use AC output in damp areas, if movement is confined, or if

there is a danger of falling.

D Use AC output ONLY if required for the welding process.

D If AC output is required, use remote output control if present on

unit.

D Disconnect input power or stop engine before installing or

servicing this equipment. Lockout/tagout input power according to

OSHA 29 CFR 1910.147 (see Safety Standards).

D Properly install and ground this equipment according to its

Owner’s Manual and national, state, and local codes.

D Always verify the supply ground − check and be sure that input

power cord ground wire is properly connected to ground terminal in

disconnect box or that cord plug is connected to a properly

grounded receptacle outlet.

D When making input connections, attach proper grounding conduc-

tor first − double-check connections.

D Frequently inspect input power cord for damage or bare wiring −

replace cord immediately if damaged − bare wiring can kill.

D Turn off all equipment when not in use.

D Do not use worn, damaged, undersized, or poorly spliced cables.

D Do not drape cables over your body.

D If earth grounding of the workpiece is required, ground it directly

with a separate cable.

D Do not touch electrode if you are in contact with the work, ground,

or another electrode from a different machine.

D Use only well-maintained equipment. Repair or replace damaged

parts at once. Maintain unit according to manual.

D Wear a safety harness if working above floor level.

D Keep all panels and covers securely in place.

D Clamp work cable with good metal-to-metal contact to workpiece

or worktable as near the weld as practical.

D Insulate work clamp when not connected to workpiece to prevent

contact with any metal object.

D Do not connect more than one electrode or work cable to any

single weld output terminal.

SIGNIFICANT DC VOLTAGE exists after removal of

input power on inverters.

D Turn Off inverter, disconnect input power, and discharge input

capacitors according to instructions in Maintenance Section

before touching any parts.

Welding produces fumes and gases. Breathing

these fumes and gases can be hazardous to your

health.

FUMES AND GASES can be hazardous.

D Keep your head out of the fumes. Do not breathe the fumes.

D If inside, ventilate the area and/or use exhaust at the arc to remove

welding fumes and gases.

D If ventilation is poor, use an approved air-supplied respirator.

D Read the Material Safety Data Sheets (MSDSs) and the

manufacturer’s instructions for metals, consumables, coatings,

cleaners, and degreasers.

D Work in a confined space only if it is well ventilated, or while

wearing an air-supplied respirator. Always have a trained watch-

person nearby. Welding fumes and gases can displace air and

lower the oxygen level causing injury or death. Be sure the breath-

ing air is safe.

D Do not weld in locations near degreasing, cleaning, or spraying op-

erations. The heat and rays of the arc can react with vapors to form

highly toxic and irritating gases.

D Do not weld on coated metals, such as galvanized, lead, or

cadmium plated steel, unless the coating is removed from the weld

area, the area is well ventilated, and if necessary, while wearing an

air-supplied respirator. The coatings and any metals containing

these elements can give off toxic fumes if welded.

OM-1327 Page 2

Arc rays from the welding process produce intense

visible and invisible (ultraviolet and infrared) rays

that can burn eyes and skin. Sparks fly off from the

weld.

ARC RAYS can burn eyes and skin.

D Wear a welding helmet fitted with a proper shade of filter to protect

your face and eyes when welding or watching (see ANSI Z49.1

and Z87.1 listed in Safety Standards).

D Wear approved safety glasses with side shields under your

helmet.

D Use protective screens or barriers to protect others from flash and

glare; warn others not to watch the arc.

D Wear protective clothing made from durable, flame-resistant mate-

rial (leather and wool) and foot protection.

Welding on closed containers, such as tanks,

drums, or pipes, can cause them to blow up. Sparks

can fly off from the welding arc. The flying sparks, hot

workpiece, and hot equipment can cause fires and

burns. Accidental contact of electrode to metal objects can cause

sparks, explosion, overheating, or fire. Check and be sure the area is

safe before doing any welding.

WELDING can cause fire or explosion.

D Protect yourself and others from flying sparks and hot metal.

D Do not weld where flying sparks can strike flammable material.

D Remove all flammables within 35 ft (10.7 m) of the welding arc. If

this is not possible, tightly cover them with approved covers.

D Be alert that welding sparks and hot materials from welding can

easily go through small cracks and openings to adjacent areas.

D Watch for fire, and keep a fire extinguisher nearby.

D Be aware that welding on a ceiling, floor, bulkhead, or partition can

cause fire on the hidden side.

D Do not weld on closed containers such as tanks, drums, or pipes,

unless they are properly prepared according to AWS F4.1 (see

Safety Standards).

D Connect work cable to the work as close to the welding area as

practical to prevent welding current from traveling long, possibly

unknown paths and causing electric shock and fire hazards.

D Do not use welder to thaw frozen pipes.

D Remove stick electrode from holder or cut off welding wire at

contact tip when not in use.

D Wear oil-free protective garments such as leather gloves, heavy

shirt, cuffless trousers, high shoes, and a cap.

D Remove any combustibles, such as a butane lighter or matches,

from your person before doing any welding.

FLYING METAL can injure eyes.

D Welding, chipping, wire brushing, and grinding

cause sparks and flying metal. As welds cool,

they can throw off slag.

D Wear approved safety glasses with side

shields even under your welding helmet.

BUILDUP OF GAS can injure or kill.

D Shut off shielding gas supply when not in use.

D Always ventilate confined spaces or use

approved air-supplied respirator.

HOT PARTS can cause severe burns.

D Do not touch hot parts bare handed.

D Allow cooling period before working on gun or

torch.

MAGNETIC FIELDS can affect pacemakers.

D Pacemaker wearers keep away.

D Wearers should consult their doctor before

going near arc welding, gouging, or spot

welding operations.

NOISE can damage hearing.

Noise from some processes or equipment can

damage hearing.

D Wear approved ear protection if noise level is

high.

Shielding gas cylinders contain gas under high

pressure. If damaged, a cylinder can explode. Since

gas cylinders are normally part of the welding

process, be sure to treat them carefully.

CYLINDERS can explode if damaged.

D Protect compressed gas cylinders from excessive heat, mechani-

cal shocks, slag, open flames, sparks, and arcs.

D Install cylinders in an upright position by securing to a stationary

support or cylinder rack to prevent falling or tipping.

D Keep cylinders away from any welding or other electrical circuits.

D Never drape a welding torch over a gas cylinder.

D Never allow a welding electrode to touch any cylinder.

D Never weld on a pressurized cylinder − explosion will result.

D Use only correct shielding gas cylinders, regulators, hoses, and fit-

tings designed for the specific application; maintain them and

associated parts in good condition.

D Turn face away from valve outlet when opening cylinder valve.

D Keep protective cap in place over valve except when cylinder is in

use or connected for use.

D Read and follow instructions on compressed gas cylinders,

associated equipment, and CGA publication P-1 listed in Safety

Standards.

OM-1327 Page 3

1-3. Additional Symbols For Installation, Operation, And Maintenance

FIRE OR EXPLOSION hazard.

D Do not install or place unit on, over, or near

combustible surfaces.

D Do not install unit near flammables.

D Do not overload building wiring − be sure power supply system is

properly sized, rated, and protected to handle this unit.

FALLING UNIT can cause injury.

D Use lifting eye to lift unit only, NOT running

gear, gas cylinders, or any other accessories.

D Use equipment of adequate capacity to lift and

support unit.

D If using lift forks to move unit, be sure forks are

long enough to extend beyond opposite side of

unit.

OVERUSE can cause OVERHEATING

D Allow cooling period; follow rated duty cycle.

D Reduce current or reduce duty cycle before

starting to weld again.

D Do not block or filter airflow to unit.

STATIC (ESD) can damage PC boards.

D Put on grounded wrist strap BEFORE handling

boards or parts.

D Use proper static-proof bags and boxes to

store, move, or ship PC boards.

MOVING PARTS can cause injury.

D Keep away from moving parts.

D Keep away from pinch points such as drive

rolls.

WELDING WIRE can cause injury.

D Do not press gun trigger until instructed to do

so.

D Do not point gun toward any part of the body,

other people, or any metal when threading

welding wire.

MOVING PARTS can cause injury.

D Keep away from moving parts such as fans.

D Keep all doors, panels, covers, and guards

closed and securely in place.

H.F. RADIATION can cause interference.

D High-frequency (H.F.) can interfere with radio

navigation, safety services, computers, and

communications equipment.

D Have only qualified persons familiar with

electronic equipment perform this installation.

D The user is responsible for having a qualified electrician prompt-

ly correct any interference problem resulting from the installa-

tion.

D If notified by the FCC about interference, stop using the

equipment at once.

D Have the installation regularly checked and maintained.

D Keep high-frequency source doors and panels tightly shut, keep

spark gaps at correct setting, and use grounding and shielding to

minimize the possibility of interference.

ARC WELDING can cause interference.

D Electromagnetic energy can interfere with

sensitive electronic equipment such as

computers and computer-driven equipment

such as robots.

D Be sure all equipment in the welding area is

electromagnetically compatible.

D To reduce possible interference, keep weld cables as short as

possible, close together, and down low, such as on the floor.

D Locate welding operation 100 meters from any sensitive elec-

tronic equipment.

D Be sure this welding machine is installed and grounded

according to this manual.

D If interference still occurs, the user must take extra measures

such as moving the welding machine, using shielded cables,

using line filters, or shielding the work area.

1-4. California Proposition 65 Warnings

Y Welding or cutting equipment produces fumes or gases which

contain chemicals known to the State of California to cause

birth defects and, in some cases, cancer. (California Health &

Safety Code Section 25249.5 et seq.)

Y Battery posts, terminals and related accessories contain lead

and lead compounds, chemicals known to the State of

California to cause cancer and birth defects or other

reproductive harm. Wash hands after handling.

For Gasoline Engines:

Y Engine exhaust contains chemicals known to the State of

California to cause cancer, birth defects, or other reproductive

harm.

For Diesel Engines:

Y Diesel engine exhaust and some of its constituents are known

to the State of California to cause cancer, birth defects, and

other reproductive harm.

OM-1327 Page 4

1-5. Principal Safety Standards

Safety in Welding, Cutting, and Allied Processes, ANSI Standard Z49.1,

from American Welding Society, 550 N.W. LeJeune Rd, Miami FL 33126

(phone: 305-443-9353, website: www.aws.org).

Recommended Safe Practices for the Preparation for Welding and Cut-

ting of Containers and Piping, American Welding Society Standard

AWS F4.1, from American Welding Society, 550 N.W. LeJeune Rd, Mi-

ami, FL 33126 (phone: 305-443-9353, website: www.aws.org).

National Electrical Code, NFPA Standard 70, from National Fire Protec-

tion Association, P.O. Box 9101, 1 Battery March Park, Quincy, MA

02269−9101 (phone: 617−770−3000, website: www.nfpa.org and www.

sparky.org).

Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P-1,

from Compressed Gas Association, 1735 Jefferson Davis Highway,

Suite 1004, Arlington, VA 22202−4102 (phone: 703−412−0900, web-

site: www.cganet.com).

Code for Safety in Welding and Cutting, CSA Standard W117.2, from

Canadian Standards Association, Standards Sales, 178 Rexdale

Boulevard, Rexdale, Ontario, Canada M9W 1R3 (phone:

800−463−6727 or in Toronto 416−747−4044, website: www.csa−in-

ternational.org).

Practice For Occupational And Educational Eye And Face Protection,

ANSI Standard Z87.1, from American National Standards Institute, 11

West 42nd Street, New York, NY 10036−8002 (phone: 212−642−4900,

website: www.ansi.org).

Standard for Fire Prevention During Welding, Cutting, and Other Hot

Work, NFPA Standard 51B, from National Fire Protection Association,

P.O. Box 9101, 1 Battery March Park, Quincy, MA 02269−9101 (phone:

617−770−3000, website: www.nfpa.org and www. sparky.org).

OSHA, Occupational Safety and Health Standards for General Indus-

try, Title 29, Code of Federal Regulations (CFR), Part 1910, Subpart Q,

and Part 1926, Subpart J, from U.S. Government Printing Office, Super-

intendent of Documents, P.O. Box 371954, Pittsburgh, PA 15250 (there

are 10 Regional Offices−−phone for Region 5, Chicago, is

312−353−2220, website: www.osha.gov).

1-6. EMF Information

Considerations About Welding And The Effects Of Low Frequency

Electric And Magnetic Fields

Welding current, as it flows through welding cables, will cause electro-

magnetic fields. There has been and still is some concern about such

fields. However, after examining more than 500 studies spanning 17

years of research, a special blue ribbon committee of the National

Research Council concluded that: “The body of evidence, in the

committee’s judgment, has not demonstrated that exposure to power-

frequency electric and magnetic fields is a human-health hazard.”

However, studies are still going forth and evidence continues to be

examined. Until the final conclusions of the research are reached, you

may wish to minimize your exposure to electromagnetic fields when

welding or cutting.

To reduce magnetic fields in the workplace, use the following

procedures:

1. Keep cables close together by twisting or taping them.

2. Arrange cables to one side and away from the operator.

3. Do not coil or drape cables around your body.

4. Keep welding power source and cables as far away from opera-

tor as practical.

5. Connect work clamp to workpiece as close to the weld as possi-

ble.

About Pacemakers:

Pacemaker wearers consult your doctor first. If cleared by your doctor,

then following the above procedures is recommended.

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OM-1327 Page 8

2-4. Principales normes de sécurité

Safety in Welding, Cutting, and Allied Processes, norme ANSI Z49.1,

de l’American Welding Society, 550 N.W. LeJeune Rd, Miami FL 33126

(téléphone : (305) 443−9353, site Web : www.aws.org).

Recommended Safe Practices for the Preparation for Welding and Cut-

ting of Containers and Piping, norme American Welding Society AWS

F4.1, de l’American Welding Society, 550 N.W. LeJeune Rd, Miami, FL

33126 (téléphone : (305) 443−9353, site Web : www.aws.org).

National Electrical Code, norme NFPA 70, de la National Fire Protection

Association, P.O. Box 9101, 1 Battery March Park, Quincy, MA

02269−9101 (téléphone : (617) 770−3000, sites Web : www.nfpa.org et

www.sparky.org).

Safe Handling of Compressed Gases in Cylinders, brochure CGA P−1,

de la Compressed Gas Association, 1735 Jefferson Davis Highway,

Suite 1004, Arlington, VA 22202−4102 (téléphone : (703) 412−0900,

site Web : www.cganet.com).

Code for Safety in Welding and Cutting, norme CSA W117.2, de la Ca-

nadian Standards Association, Standards Sales, 178 boulevard

Rexdale, Rexdale (Ontario) Canada M9W 1R3 (téléphone : (800)

463−6727 ou à Toronto : (416) 747−4044, site Web : www.csa−interna-

tional.org).

Practice For Occupational And Educational Eye And Face Protection,

norme ANSI Z87.1, de l’American National Standards Institute, 11 West

42nd Street, New York, NY 10036−8002 (téléphone : (212) 642−4900,

site Web : www.ansi.org).

Standard for Fire Prevention During Welding, Cutting, and Other Hot

Work, norme NFPA 51B, de la National Fire Protection Association,

P.O. Box 9101, 1 Battery March Park, Quincy, MA 02269−9101 (télé-

phone : (617) 770−3000, site Web : www.nfpa.org et www.sparky.org).

OSHA, Occupational Safety and Health Standards for General Indus-

try, Title 29, Code of Federal Regulations (CFR), Part 1910, Subpart Q,

and Part 1926, Subpart J, de l’U.S. Government Printing Office, Super-

intendent of Documents, P.O. Box 371954, Pittsburgh, PA 15250 (il y a

10 bureaux régionaux − Téléphone pour la Région 5, Chicago : (312)

353−2220, site Web : www.osha.gov).

2-5. Information sur les champs électromagnétiques

Données sur le soudage électrique et les effets des champs magnéti-

ques basse fréquence sur l’organisme

En parcourant les câbles de soudage, le courant crée des champs élec-

tromagnétiques. Les effets potentiels de tels champs restent

préoccupants. Cependant, après avoir examiné plus de 500 études qui

ont été faites pendant une période de recherche de 17 ans, un comité

de spécialistes du National Research Council a conclu : « L’accumula-

tion de preuves n’a pas démontré que l’exposition aux champs

magnétiques et aux champs électriques à haute fréquence constitue un

risque pour la santé humaine ». Toutefois, les études et l’examen des

preuves se poursuivent. En attendant les conclusions finales de la re-

cherche, il serait souhaitable de réduire l’exposition aux champs

électromagnétiques pendant le soudage ou le coupage.

Afin de réduire les champs électromagnétiques en milieu de travail, res-

pecter les consignes suivantes :

1. Garder les câbles ensemble en les torsadant ou en les fixant avec du

ruban adhésif.

2. Mettre tous les câbles du côté opposé à l’opérateur.

3. Ne pas s’enrouler les câbles autour du corps.

4. Garder le poste de soudage et les câbles le plus loin possible de soi.

5. Placer la pince de masse le plus près possible de la zone de soudage.

Consignes relatives aux stimulateurs cardiaques :

Les personnes qui portent un stimulateur cardiaque doivent avant tout

consulter leur médecin. Si ce dernier les déclare aptes, il leur est recom-

mandé de respecter les consignes ci-dessus.

OM-1327 Page 9

SECTION 3 − INSTALLATION

3-1. Specifications

Rated Output

Max. Open

Circuit

60 Hz

Amps Input at Rated Output

ate

d O

utput

rcu

Voltage

60 H

200 V 230 V 460 V 575V KVA KW

300 A at

32 VDC,

60% Duty

350 A at

32 VDC,

40% Duty

Single-Phase

(1.7*)

(1.5*)

(0.75*)

(0.5*)

13.1 11.2

60% Duty

Cycle

40% Duty

Cycle

Three-Phase

(1.7*)

(1.5*)

(0.75*)

(0.5*)

11.6 11.5

* While idling

Wire Type and Diameter Wire Feed Speed Dimensions Net Weight

Solid Steel Stainless Steel Aluminum 50−700 IPM

(1 3 17 8 m/min)

H: 34 in (864 mm)

W: 19 in (483 mm)

181 lb

(82 kg)

.023 − .045 in

(0.8 − 1.1 mm)

.030 − .045 in

(0.8 − 1.1 mm)

.035 − .047 in

(0.9 − 1.2 mm)

(1.3−17.8 m/min) W: 19 in (483 mm)

D: 41 in (1041 mm)

(82 kg)

Operating Temperature Range: −20C to +40C Storage Temperature Range: -30C to + 50C

3-2. Duty Cycle And Overheating

6 Minutes Welding 4 Minutes Resting

Duty Cycle is percentage of 10

minutes that unit can weld at rated

load without overheating.

If unit overheats, thermistors open,

output stops, and cooling fan runs.

Wait fifteen minutes for unit to cool.

Reduce amperage or voltage, or

duty cycle before welding.

Y Exceeding duty cycle can

damage unit and void

warranty.

Overheating

A or V

Reduce Duty Cycle

Minutes

60% Duty Cycle At 300 Amperes 40% Duty Cycle At 350 Amperes

sduty1 5/95 / 217 442-A

4 Minutes Welding 6 Minutes Resting

10 15 20 25 30 40 50 60 70 80 90 100

100

150

200

225

250

300

400

500

% DUTY CYCLE

WELDING AMPERES

OM-1327 Page 10

3-3. Volt-Ampere Curve

217 443-A

1 Normal Volt-Ampere Curves

The volt-ampere curves show the

normal minimum and maximum

voltage and amperage output capa-

bilities of the welding power source.

Curves of other settings fall be-

tween the curves shown.

MAX VOL T S

MIN V OLTS

0 50 100 150 200 250 300 350

VOLTAGE

AMPERAGE

3-4. Installing Work Clamp

1 Work Cable

2 Boot

Route cable through front panel

opening. Slide boot onto work

cable.

3 Negative (−) Output Terminal

Connect cable to terminal and

cover connection with boot.

Close door.

803 540-B

Tools Needed:

3/4 in

OM-1327 Page 11

3-5. Installing Welding Gun/Cable Holder

1 Welding Gun/Cable Holder

2 Wrapper

3 Slots

Angle holder to insert hook through

bottom slot. Drop holder down so

that hook exits top slot.

Ref. 803 545-A / Ref. 803 539-A

3-6. Installing Welding Gun

1 Drive Assembly

2 Gun Securing Knob

3 Gun End

Loosen securing knob. Insert gun

end through opening until it bottoms

against drive assembly (make sure

gun end does not touch drive rolls).

Tighten knob.

4 Gun Trigger Plug

Insert plug into receptacle, and

tighten threaded collar.

Close door.

Ref. 803 541-A

OM-1327 Page 12

3-7. Connecting Spoolmatic) 15A Or 30A Gun

803 568-B

1 Gun Trigger Plug

Insert plug into receptacle, and

tighten threaded collar.

2 Weld Cable

3 Shielding Gas Hose

Route weld cable and gas hose

through opening in front panel.

4 Positive Weld Output Terminal

Connect weld cable to weld output

terminal.

5 Regulator/Flowmeter

Route shielding gas hose through

wire drive compartment, out

opening in rear panel, and up to

regulator/flowmeter. Connect gas

hose to regulator/flowmeter.

Tools Needed:

3/4, 5/8 in

OM-1327 Page 13

3-8. Connecting XR Edge, XR-A Gun, Or XR-A Python

803 569-A / Ref. 803 570 -A / Ref. 803 463

1 Gun End

2 Gun Liner

3 Wire Outlet Guide

Trim excess liner from end of gun

so no more than 3/32 in (2.4 mm) of

liner extends past wire outlet guide.

4 Gun Securing Knob

Loosen securing knob. Insert gun

end through opening until it bottoms

against drive assembly (make sure

gun end does not touch drive rolls).

Tighten knob.

Be sure to change drive rolls to the

proper size and type.

5 Gun Trigger Plug

Insert plug into receptacle, and

tighten threaded collar.

3/32 in

(2.4 mm)

. Be sure to trim liner to

proper extension.

OM-1327 Page 14

3-9. Setting Gun Polarity For Wire Type

1 Polarity Changeover Information

Always read and follow manufacture’s

recommended polarity.

3/4, 11/16 in

Ref. 803 541-A

Changing Polarity

Wire Drive

Assembly Lead

Work Clamp Lead

Positive

Terminal

Shown as shipped − Electrode Positive (DCEP): For

solid steel, stainless steel, aluminum, or flux core with

gas wires (GMAW).

Negative

Terminal

Electrode Negative (DCEN): Reverse lead connections

at terminals from that shown above for gasless flux core

wires (FCAW). Drive assembly becomes negative.

OM-1327 Page 15

3-10. Installing Gas Supply

803 542-A

Tools Needed:

1-1/8, 5/8 in

Rear Panel

Obtain gas cylinder and chain to

running gear, wall, or other

stationary support so cylinder

cannot fall and break off valve.

1 Cap

2 Cylinder Valve

Remove cap, stand to side of

valve, and open valve slightly. Gas

flow blows dust and dirt from valve.

Close valve.

3 Cylinder

4 Regulator/Flowmeter

Install so face is vertical.

5 Regulator/Flowmeter Gas

Hose Connection

6 Welding Power Source Gas

Hose Connection

Connect supplied gas hose

between regulator/flowmeter gas

hose connection, and fitting on

rear of welding power source.

7 Flow Adjust

Typical flow rate is 20 cfh (cubic

feet per hour). Check wire

manufacturer’s recommended

flow rate.

Argon Gas Or

Mixed Gas

Regulator/Flowmeter

for 350P model shown.

. DO NOT use Argon/Mixed gas regulator/flowme-

ter with CO

shielding gas. See Parts List for optional

gas regulator/flowmeter.

3-11. Installing Wire Spool and Adjusting Hub Tension

072573-B

When a slight force is needed to turn spool, tension is set.

15/16 in

Use compression spring with

8 in (200 mm) spools.

Tools Needed:

OM-1327 Page 16

3-12. Electrical Service Guide

Single-Phase Three-Phase

Input Voltage 200 230 460 575 200 230 460 575

Input Amperes At Rated Output 69 61 30 24 34 30 15 12

Max Recommended Standard Fuse Or Circuit Breaker Rating

In Amperes

Circuit Breaker

, Time-Delay

80 70 35 25 40 35 15 10

Normal Operating

100 90 40 35 50 45 20 15

Min Input Conductor Size In AWG 6 8 10 12 10 10 14 14

Max Recommended Input Conductor Length In Feet (Meters)

101

(31)

(26)

229

(70)

217

(66)

114

178

277

Min Grounding Conductor Size In AWG 8 8 10 12 10 10 14 14

Reference: 1999 National Electrical Code (NEC)

1 Choose a circuit breaker with time-current curves comparable to a Time Delay Fuse.

2 “Time-Delay” fuses are UL class “RK5” .

3 “Normal Operating” (general purpose − no intentional delay) fuses are UL class “K5” (up to and including 60 amp), and UL class “H” ( 65 amp and

above).

Y Caution: Failure to follow these fuse and circuit breaker recommendations could create an electric shock or fire hazard.

Y Caution: This unit is either a 200/230 ac input voltage model or 460/575 ac input voltage

model. See rating label on unit and check voltage available at site to be sure it matches

the voltage specified on the rating label.

OM-1327 Page 17

3-13. Selecting A Location And Connecting 3-Phase Input Power

803 543-B

Y Installation must meet all National and

Local Codes - have only qualified

persons make this installation.

Y Disconnect and lockout/tagout input

power before connecting input

conductors form unit.

Y Always connect green or green/yellow

conductor to supply grounding terminal

first, and never to a line terminal.

Y Caution: This unit is either a 200/230

ac input voltage model or 460/575 ac

input voltage model. See rating label

on unit and check voltage available at

site to be sure it matches the voltage

specified on the rating label.

Disconnect Device Input Power

Connections

1 Rating Label

2 Input Power Conductors

3 Line Disconnect Device

4 Disconnect Device (Supply) Grounding

Terminal

5 Grounding Conductor

Connect green or green/yellow grounding

conductor to disconnect device grounding

terminal first.

6 Disconnect Device Line Terminals

Connect input conductors L1, L2, and L3 to

disconnect device line terminals.

7 Overcurrent Protection

Select type and size of overcurrent protection

using Section 3-12 (fused disconnect switch

shown).

Close and secure door on line disconnect

device.

Tools Needed:

= GND/PE Earth Ground

Rear Panel

18 in (457 mm)

for airflow

Y Do not move or operate

unit where it could tip.

OM-1327 Page 18

3-14. Selection A Location And Connecting 1-Phase Input Power

Ref. 803 543-B

Tools Needed:

= GND/PE Earth Ground

Y Installation must meet all National and

Local Codes - have only qualified

persons make this installation.

Y Disconnect and lockout/tagout input

power before connecting input

conductors form unit.

Y Always connect green or green/yellow

conductor to supply grounding terminal

first, and never to a line terminal.

Y Caution: This unit is either a 200/230

ac input voltage model or 460/575 ac

input voltage model. See rating label

on unit and check voltage available at

site to be sure it matches the voltage

specified on the rating label.

Three Conductor Power Cord Preparation

1 Rating Label

2 Input Power Conductors

3 Black And White Input Conductors

4 Red Input Conductor

5 Insulation Sleeving

6 Grounding Conductor

7 Electrical Tape

Insulate and isolate red conductor as shown.

Disconnect Device Input Power

Connections

8 Line Disconnect Device

9 Disconnect Device (Supply) Grounding

Terminal

Connect green or green/yellow grounding

conductor (see Item 6) to disconnect device

grounding terminal first.

10 Disconnect Device Line Terminals

Connect input conductors L1 and L2 to

disconnect device line terminals.

11 Overcurrent Protection

Select type and size of overcurrent protection

using Section 3-12 (fused disconnect switch

shown).

Close and secure door on line disconnect

device.

Rear Panel

18 in (457 mm)

for airflow

Y Do not move or operate

unit where it could tip.

OM-1327 Page 19

3-15. Threading Welding Wire For Roughneck Gun

1 Wire Spool

2 Welding Wire

3 Inlet Wire Guide

4 Drive Roll

5 Intermediate Wire Guide

6 Outlet Wire Guide

7 Pressure Adjustment Knob

8 Gun Conduit Cable

Lay gun cable out straight.

Tools Needed:

6 in

(150 mm)

. Hold wire tightly to

keep it from unraveling.

WOOD

Open pressure assembly. Pull and hold wire; cut off end. Push wire thru guides into gun;

continue to hold wire.

Close and tighten pressure

assembly, and let go of wire.

Remove gun nozzle and contact tip. Turn On.

Press gun trigger until wire

comes out of gun. Reinstall

contact tip and nozzle

Feed wire to check drive roll pressure.

Tighten knob enough to prevent slipping.

Cut off wire. Close

and latch door.

803 570-A / 803 544-A / S-0627-A

Tighten

. Use pressure indi-

cator scale to set a de-

sired drive roll pres-

sure.

Pressure

Indicator

Scale

Tighten

35621 4

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Miller LE350804, MATIC 350, MATIC 350P, Millermatic 350, Millermatic 350P Owner's manual

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